I’m not sure which story you’re referring to but if it helps, character vs nature is usually when the character is against some sort of natural disaster like a tornado, tsunami, hurricane, etc.
Simile because simile means to smile and so blah blah blah
"C", "Maybe".
The credibility depends on the websites contents and credentials.
A website like a government's page is considered, "credible", because it is from a trusted source; the government. Whereas getting a random answer from Yahoo is considered less credible because of it not stemming from a trustable source.
Hey, it's TeenSuicide.